A king size mattress measures 5 feet wide and 6 feet 6 inches long, making it our second largest mattress size available. Available in a variety of styles with different fillings to choose from, you can pick between classic options such as traditional springs to more advanced materials such as memory foam and more.
Delivery available within 3 weeks
Delivery available within 10 days
£189 - £2,499
We have a wide range of affordable and high-quality king size mattresses available; each type has its own benefits:
A king size memory foam mattress features advanced technology designed to maximise your sleep experience. The mattress will soften and respond to you and your sleeping position. This makes these mattresses great for keeping you comfortable all night long.
Providing great support, a king size pocket spring mattress is not as warm as some other types, and will keep you cooler during the night. Each spring is independent, meaning the mattress responds perfectly to your sleep position and movement, evenly distributing your bodyweight.
A king size traditional spring mattress is usually the most affordable option, making them great for those on a budget. However, this doesn’t mean that they lack quality. They are often hand-tufted and feature edge-to-edge support. This is a good choice for those looking for a cheap king size mattress. The firmer options tend to offer good back alignment properties, which is perfect for those who need extra spinal support.
With a Zip and Link mattress you can have varied technologies and comfort levels within one design. This makes them a popular choice for couples. For example, if your partner is fond of a firm mattress but you prefer something softer, a zip and link mattress could be an ideal solution as you both get to sleep on what you want.
With a wide array of types and comfort grades available, it's not always easy to say which is the best king size mattress for you; a lot is based on personal preference and your sleeping position:
If you sleep on your side, you'll probably need a mattress with plenty of cushioning. Soft or Medium comfort grade mattresses provide just that, allowing you to sink slightly into the mattress while also keeping your spine aligned and healthy. Medium comfort grade mattresses are a suitable choice if you tend to vary your sleeping position during the night too. You may wish to consider a king size ActiGel mattress as these will cradle the shape of your body, no matter what position you sleep in.
For those who sleep on their front or back a Firm or Extra Firm mattress could be a more suitable choice. These provide increased support for your spine and joints from the pressure that can build up from sleeping in these positions. A firm pocket spring or memory foam mattress is an exceptional choice as they’ll respond to your body shape to provide extra support and comfort.
Choosing a king size mattress is an important investment – one that’s going to last for years. That’s why we want to make sure you get the very best. Our 40-Night Sleep Guarantee gives you the option to swap your mattress for another after sleeping on it for 30-40 nights (Ts & Cs apply).